Gas heater



April 19, 1932.

L. 0. SMITH 1,854,232

GAS HEATER Filed Feb. 10,1930 2 Sheets-Sheet l lie?) April 19, 1932. c sn-H 1,854,232

GAS HEATER Filed Feb. 10, 1950 2 Sheets-Sheet 2 Patented Apr. 19, 1932warren sir-Auras;-

mini QJE'FLQEZ LEQCMSMQITH QE MINNEABOLISLMINNESOTA, ASSIGNOR.TbfiM'l'l-H SYSTEM..HEAT NG (70., OF MINNEAPOLIS, MINNESOTA, ACORPORATION OF IVIINNESQTA GAS HEATER Applicationfiled February 10,1930. Serial No. 427,222.

My; present invention has for itszobject to provide am efli'cient,economical and. safe-1 gas heater intended forgeneral use but.especial.-. ly'designedfor-use i-n-heating. school rooms and-the like.

To the above end, generally stated, the inyent ionconsists of the noveldevices and combinations of devices hereinafter described and definedin-the claims.

' In, the accompanying drawings, which illustratethe invention, likecharacters-indi cate likepartst-hroughout the several views.

Referring to the drawings:

Fig. 1 is afrontelevation of the improved heater with some parts brokenaway and: witl-r other parts indicated by broken lines;

Fig. 2 is a view-principally in central trans verse vertical? section;

Fig- 3' is-a horizontalsection taken on the line oiifFig; 2 and- Fi'gs.4, 5 and G are detail-views partly in plan and partly in horizontalsection taken onthe'; lineal-4, 5-5 and 6-6, respectively, Of F-lgk 2.

The numeral 7 indicates an upright cylindrical shell having a closedbottom and top, the latter of which is provided with an aXial vent oroutlet 8 onto which the lower end of the smoke pipe 9 is telescoped andwhich pipe leads to a chimney, not shown.

This shell 7 is provided with an annular base 10 having fourcircumferentially spaced legs 11 which support said shell and base abovethe floor. Surrounding the shell 7 concentric therewith is a jacket orcasing 12 that is open at its ends and radially spaced from said shellto leave an air space therebetween. This acket 12 is supported onbrackets 13 on the base 10 and legs 11 with its uppeer and lower endssubstantially in the planes of the corresponding ends of the shell 7 Inthe front of the jacket 12 is a large door opening normally closed by ahorizontal swinging door 14.

WVithin the shell 7 near the bottom thereof is a ring-like gas burner 15which is substantially square in cross-section and has on its top amultiplicity of bossed gas escape holes 16. Said burner 15 loosely restson four circumferentially spaced angle brackets 17 secured bynut-equipped bolts18 to the'shell' 7;. The diameter of'theburner 15,-isconsiderably'less than the shell 7 andleavesan air; passageway. between,said bu ner; and shell. For holdihgthe burner 15 substan,-. tiallyconcentricwith, theshell; 7, with free dom i011 avlimited shift ng; mentt e e n in. a horizontal plane; there are-provided upstandingpositioning fingers 19. Thelower; endgportions of the fingers lgextendbetween the shell, 7, andbrackets 17 and are held in position; by thebolts 18; Said fingers. 19 above the brackets l'? are laterally insettoward the-burner 15 ut. re ut. o ontac therewith to permit, freeexpansion of said burner. Int-he front of; the casing 7-is a door;opening 20 wh dli extends from the bottom of: said, shell to a; pointabove the burnerlfi.

A door 21 hinged to the burner 15 normally closes the upper portionofthe door-opening 20randiits bottoma is; slightly belowsaid burn: 61".;Form-ed, the door; 21- at the center, thereof: is. an; opening 22.through: ich he burnerlfiimay be lighted. The-b t om portionofthe dooropenin-g -20-affords a; con- Stantlyopen air intake for i the; burner15.

A: gas, supplypipe 23.,leacling, from, nysuitablesource Qfs-upply', notshown, extends LlIlGlGIr the jacket; 12 at the-left side thereofandits;up.p..er end is attached-Ito the bnrner 15 and has commun cationtherewith ut: WZLIClE of 'the j acketa12 thegas su-pply pipe is providedwith. a valve 241 by theuse of; which the s pply. of gas-t0 he mt er 15ay e: regulated or entirely-g h t fi.

Above the burner 15 is -adeflector25 ingthe, form of an'inverted conethat, isconcen-tric with,the shell 7; andits base-is of a smallerdiameter, to leave an, air. passageway between said shell deflector.This deflector 25- is loosely. suspended. by. a pluralityof nutqu ppedbolts 26 from the. hell" '2 wh h loosely, extendfthrough holes in anglebrackets2'l'holted to the shell 7and lugs 28 formed with the base of thedeflector 25*. This methodof suspending the deflector 25irom theshel'l7permits free expansion and'contraction thereof. In the apex o-ffthedeflector- 25' is, as-show-n, two-air holes 29 for the passageeofairintothedeflector 25* to cause gas collected in said deflector toburn. Vertically spaced above the distributor is a spreader in the formof a horizontal disc loosely held under a plurality of angle brackets 31secured to the shell 7 by nut-equipped bolts 32 which loosely extendthrough radial slots 33 in the spreader 30 and brackets 31. By thusloosely suspending the spreader 30 from the shell 7 the same is free toexpand and contract thus avoiding warping and buckling thereof.

Above the spreader 30 is a plurality of vertically spaced baflies 34: inthe form of flat segmental plates the arcs of which closely engage theshell 7 and angle member 35 rigidly secure said baflles to the shell 7.Those baffles 34 are arranged in the shell 7 with their chords paralleland alternately arranged on opposite sides of said shell. The spacebetween the walls of the shell 7 and cords of the battles 34 formvertically spaced passageways 36 alternately arranged on opposite sidesof the shell 7 which cause the products of combustion to travel a longzigzag course in the shell 7 from one side to the other thereof betweenthe baffles 34.

Fresh air fromthe outside of the building is conveyed through an intakeconduit to the heater where the same is warmed as it travels upwardbetween the shell 7 and jacket 12 and radiates in all directions intothe room. The fresh air intake conduit is only fragmentari lzyillustrated and indicated by the numeral 3 The flame burner givesmaximum heat which is directed by the deflector 25 against the walls ofthe steel shell 7 by said deflector and the spreader 30. From thespreader 30 the heat travels the long course in the shell 7 formed bythe baffles 34: which directs the heat alternately against oppositewalls of the shell 7 in the passageway 36. At the top of the shell 7 theproducts of combustion pass through the outlet 8 to the smoke pipe 9which conveys the same to the chimney and never into the room. Heat fromthe baffles 34 due to their contact with the shell 7 is transmitted tosaid shell where the same is radiated into the room. Due to the flamepassageway in the shell 7 very little heat will escape through theoutlet- 8.

There will be no shortage of oxygen in the room as the burned air passesout through the chimney and warm fresh air is constantly taking itsplace. The door opening 20 below the door 21 is always open so thatthere will be an air supply to the gas burner 15 at all times and of theproper volume. This air from the door opening 20 passes upward throughthe annular burner 15 as well as between said burner and the walls ofthe shell 7.

The air drawn into the interior of the deflector 25 through the airholes 29 is for the purpose of combustion so that the gases as theyaccumulate in the deflector 25 are burned and thus prevent explosions.

The door opening 20 which is constantly open affords an efiicientventilator for the room as the draft produced in the heater by the heatfrom the burner draws the foul air from the floor and uses the same forthe purpose of combustion. Fresh air to replace the foul air drawn fromthe room through the door opening 20 is replenished by a fresh airintake, not shown.

lVhat I claim is:

1. A heater of the class described comprising a shell, a ring-likeburner in the shell, a hollow inverted conical deflector over theburner, a disk-like spreader plate spaced above the deflector, saidburner, deflector, and spreader plate being substantially axiallyaligned at the axis of the shell and spaced from the walls thereof toleave annular air passageways therebetween, said deflector having anopen base and an air passageway in its apex, and vertically spacedbattles in the shell above the spreader plate.

2. A heater of the class described, comprising a shell, a range-likeburner in the shell, an inverted hollow conical deflect-or above theburner and spaced from the wall of the shell, and a spreader in theshell spaced above the deflector for the circulation of air Verticallybetween the shell and deflector and horizontally between the deflectorand spreader, said deflector having in its apex an air passageway andalso having an open base, whereby air entering the deflector through itsair passageway will cause gases in the deflector to burn.

In testimony whereof I afiix my signature.

LEO C. SMITH.

